Mortuus Weapon Upgrades Guide: Gun Ascension Altar Upgrades and Mystery Box Weapons

Understand weapon progression in the Mortuus demo, including feeding weapons to the Gun Ascension altar and spinning the mystery box.

Locating the Gun Ascension Altar and Power Requirements

In Mortuus, weapon advancement centers around the Gun Ascension chamber. Housed within a dedicated reactor room bathed in distinct purple light, this altar functions similarly to classic cooperative zombie Pack-a-Punch stations. When players initially locate the station, however, the terminal remains inert because Gun Ascension requires facility power to operate.

Reaching the altar requires budgeting points to buy access doors through procedural brutalist corridors. Activating the main power grid — by learning how to turn on power — restores electrical current throughout the facility, illuminating the chamber and granting access to the upgrade terminal. Coordinating door purchases early guarantees that teams locate the machine before escalating wave densities overwhelm baseline weaponry.

Altar Upgrades and Elemental Modifiers

Once power is running, players can feed their equipped gun directly into the Gun Ascension altar. The machine permits repeated enhancements as many times as a player can afford. Feeding a weapon to the altar grants substantial stat improvements, such as a 35% base damage increase alongside enhanced precision lethality.

Beyond standard ballistic increases, repeated ascension introduces elemental and area modifications. Applying ice slows charging undead, while explosive rounds kill nearby zombies caught in the impact radius. Performing repeated ascensions allows players to re-enhance firearms across escalating point tiers, unlocking +40% headshot multipliers and expanded magazine capacities.

Mystery Box Weapon Acquisition and Wall Buys

Acquiring dependable firearms requires locating the mystery box or purchasing weapons directly off interior walls. Wall fixtures offer guaranteed acquisitions like standard shotguns, whereas the mystery box gambles points for randomized armaments. Finding the mystery box allows teams to cycle through firearms until securing high-capacity options.

The mystery box weapon pool includes diverse military armaments, ranging from close-quarters shotguns to rapid-fire weapons like the MP7 submachine gun and heavy belt-fed firearms like the PKM light machine gun. Securing high-tier automatics from the mystery box before visiting the Gun Ascension altar provides the foundation needed for late-round endurance.

The table below lists firearm ballistic specifications and magazine capacities from the game's files.

Weapon	Category	Magazine	Reserve Ammo	Reload Speed	Empty Reload
MP7	SMG	40	240	1.7s	2.2s
PKM	LMG	100	300	4.5s	5.5s
AUG	Assault Rifle	30	180	2.0s	2.6s
G36	Assault Rifle	30	180	2.0s	2.6s
M16	Assault Rifle	30	180	2.0s	2.6s
1911	Pistol	8	80	1.4s	1.8s
SPAS-12	Shotgun	8	48	2.4s	3.0s
SVD	Sniper Rifle	10	60	2.6s	3.2s

Round Draft Synergies and Weapon Progression

Each completed round rewards players with draft selections that complement their upgraded arsenal. Drafting modifiers that expand ammunition pools or sharpen critical hit ratios offsets the intense bullet consumption of automatic ascended firearms. Upgrading high-rate-of-fire weapons like the MP7 ensures rapid horde clearance in tight brutalist corridors.

Players should balance spending between weapon ascensions and ammunition purchases to avoid running empty during high-density waves. Pairing ascended guns with active perks and tactical movement covered in our beginner tips ensures long-term survival against relentless mutant waves.